How would I answer this? Someone please help.

What are the most populous and least areas of russia and why are some areas more heavily populated than others

Donald is studying the eating habits of all students attending his school. he samples the population by dividing the students into groups by grade level and randomly selecting a proportionate number of students from each group. he then collects data from the sample. which type of sampling is used? select the correct answer below: systematic sampling convenience sampling stratified sampling cluster sampling

What do turbans indicate about the wearer? a.the wearer’s social status the wearer’s social statusb.the wearer’s birthplacethe wearer’s birthplacec.the wearer’s marital statusthe wearer’s marital statusd.the wearer’s religious sect the wearer’s religious sect